<%--
  Created by IntelliJ IDEA.
  User: Aiden
  Date: 2019/5/14
  Time: 23:35
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>注册</title>
</head>
<%--<script>--%>
<%--function aler(flag) {--%>
<%--if(flag==1)alert("11");--%>
<%--}--%>
<%--</script>--%>
<body>

<div>
    <script>
        alert("用户名已存在");
        window.history.back(-1);
    </script>

</div>
</body>
</html>
